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Windows 7: UPS question

05 May 2018   #1
F22 Simpilot

Windows 7 Ultimate x64
UPS question

I need to buy a UPS, but I'm not sure what raiting I need. They are listed in volt amps. My PSU is 750 watts, but I know I'm probably using about 200 watts if that. I can check with my clamp meter. I was thinking about this one: CyberPower CP850PFCLCD UPS 850VA 510W PFC compatible Pure sine wave -

It says it has an output of 510 watts. I think that may be enough power for what I need. I will be backing up 2 monitors, and the PC.

My System SpecsSystem Spec
05 May 2018   #2

Windows 7/8.1/10 multiboot

That's the exact UPS I'm using and I love it, but since you didn't fill in your system specs it's going to be hard for anyone to get very specific.

My CP850PFCLCD is powering an old Dell mini-tower PC, a 14" laptop (~25W), 24" and 27" monitors (10-15W each), and a handful of extraneous equipment (router, 2-3 ext. HDDs, etc). Those are the actual power draws per the CP850PFCLCD's display, BTW, not per spec sheets. The PC has a 300W PSU, and the UPS tells me it's power draw ranges from 80-160W, depending on what it's doing.

My equipment never seems to draw more than ~250W collectively, and that's only on brief spikes. Most of the time it's all running under ~150W.

If your PSU is 750W, I presume your PC is fitted out with beefier components than my run-of-the-mill PC, but I couldn't guess how it compares to what I'm running.
My System SpecsSystem Spec
05 May 2018   #3
Lady Fitzgerald

Win 7 Ultimate 64 bit

I've had excellent luck with Cyberpower. The unit you linked is a good one that will work with any computer power supply. Assuming your computer is using 200w and each monitor is using, say, 50w, you will probably get around six minutes run time when the batteries are new. This should give you enough time to safely shut down your computer when you have a power outage.

However, it will take up to eight hours to recharge the batteries. If you have a second outage, say, half an hour later, you may not have enough battery life left to safely shut things down. Also, keep in mind that battery capacity will slowly decline over time. Generally, two years is about all the life you can expect to get from the batteries, especially if you have frequent outages. if you went to a larger unit, the increased battery capacity would give you more wiggle room for multiple outages.

The wattage is how much power you can draw from the UPS. It will be less than amount of power the UPS will draw from the wall socket because the UPS has to to be able to also charge or recharge the batteries at the same time it's supplying power to the computer, etc.

The VA (Volt/Amp) rating, to over simplify it, is the amount of power the UPS will draw from the wall socket. An 850VA rating will draw a little over 7A from the wall socket at 120v (divide the VA rating by the voltage to get the amps). A 1325VA will draw a little over 11A. How big you can go will be determined by the amp rating of the circuit (ie. the size of the fuse or breaker protecting the circuit the wall socket is on) and how much additional load is on that circuit (lamps, appliances, etc.). You generally want to use only 80% or less of the load rating of a circuit full time. I have the 1500VA version of that UPS. which I'm very happy with, but, since it draws 12.5A, I have it plugged into its own circuit.
My System SpecsSystem Spec

05 May 2018   #4
Paul Black

7 HP SP1 64-bit Vista HB SP2 32-bit Linux Mint 18.3

Hi F22 Simpilot,

As dg1261 has kindly pointed out, perhaps you could include your system specifications in your UserCP > Edit System Spec setup.
The tutorial below (Published by Brink and written by CyberZeus) let's you easily see all of your system information, and has an option to make filling out your system specs here at Seven Forums easier to do.

How to See Your System Specs with "System Info"

This way it will be easier for people to help you in the future!

I hope this helps!
My System SpecsSystem Spec
05 May 2018   #5

Windows 10 Pro x64 x3, Ubuntu

Most if not all UPS suppliers provide calculators to size the required UPS, one that may be of use to you is ...

Prices are in Australian Dollars

This is not an endorsement of the company and I would actually recommend that you use the tools on a number of sites - you may have to do some research as to actual loads expected.

Also remember that the primary use of a UPS is to protect the system and most importantly your data, they are designed to "parachute" a system to shutdown if the supply should fail. To do this you will only need a UPS to supply power for 10-15 minutes.

If you wish to install a UPS to allow you to carry on working or gaming for an hour or two then the Power rating, size and Cost will quickly rise exponentially

I personally have a UPS of 2.2KVA which will run my system for a while and I also due to location have a separate 900KVA unit to support my Router, Modem, and Cordless phone & an LED uplighter - these things have to be considered in today's world
My System SpecsSystem Spec
06 May 2018   #6
F22 Simpilot

Windows 7 Ultimate x64

Yeah, I will give you my system Specs. I could just as easily use my clamp meter that is true RMS to check the amp load on the parts I intend on placing on the UPS though. But here are my PC Specs:

GIGABYTE AORUS GA-Z270X-Gaming K7| i5 6600k | Evo 212 cooler | 8GB 2666 MHz Ballistix Tactical RAM | Crucial MX300 256GB SSD | 1 TB Hitachi platter | GTX 1050TI | Antec 750 gold

I had no idea that a UPS would draw that many amps. This is quite disconcerting since I like to kick on a small space heater in my room while the PC is running, and if I can remember right, that space heater drew at least 11 amps. I can only imagine the breaker for the room is 15 amps. I'd have to check.
My System SpecsSystem Spec
06 May 2018   #7

Windows 7 Home Premium 64 bit sp1

You really don't need to get concerned about that 7 amp rating on charging or recharging the UPS internal battery. These batteries are usually 12 volts & use one or more of them depending on the output rating of the UPS. Normally these batteries would be recharged at probably a maximum of 5 amps at 14 volts, tapering off as the battery becomes fully charged to a trickle charge to keep it fully charged.

If we assume 5 amps at 14 volts = 70 watts. A 70 watts draw from a 110 volt system would barely be 0.70 amp. 14 volts has been used here as that is the usual recharging voltage for a 12 volt battery.
My System SpecsSystem Spec
06 May 2018   #8
F22 Simpilot

Windows 7 Ultimate x64

Okay, thanks.
My System SpecsSystem Spec

 UPS question

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